The story was never ended. Lego moved on to invasion from below instead of finishing the story arc it seemed like they were setting up with the brains, stolen hero factory plans and the suspected return of von nebula. But I assume that the return of Bionicle was already in the works and that if lego finished Hero factory's story ark, it might have allowed Hero factory to continue into Bionicle G2's run and possibly push back it's announcement. But who knows, that's my theory anyway. Besides, why did Bionicle have a very little amount of advertisement. Especially in the Lego magazine. If I remember, there was about 2-3 comics that appeared and only to of the magazines even gave an actual section to Bionicle G2.